Rotary cutter.



' Patented Ian. 28, 11902. H. A..HANNUM.

ROTARY CUTTER. (Application filed Mar. 27, 1901.)

2 Sheets-Sheet I.

(No Model.)

' zzWENTdR ATTORNEY.

2 U l 2 n a l. d flu t n e t a P am E UT NT NU Ac Y v.Q A T M 0w 3 w W.6. 0 N

(Application filed Mar. 27, 1901.)

2 Sheets-$heat 2.

(No Model.)

WITNESSES: gp. JMJJV 94 PATENT OFFICE.

HENRY ANSEL I-IANNUM, OF CAZENOVIA, NEW YORK.

ROTARY SPECIFICATION forming part of Letters CUTTER.

Patent No. 691,939, dated January 28, 1902.

Application filed March 27, 1901. SerialNo. 53,043. (No model.)

.i'o aZZ whom, it may concern:

Be it known that I, HENRY ANSEL HANNUM, a citizen of the-United States,and a resident of Oa'zenovia, in the county of Madison, in the State ofNew York, have invented new and useful Improvements in Rotary Cutters,of which the following, taken in connection with the accompanyingdrawings, is a full, clear, and exact description.

This invention relates to the class of rotary cutters which are designedfor operating on very hard substances, more particularly the species ofcutter employed in the comminutingmachine shown in my Letters Patent No.11,298, (reissue,) dated January 3, 1893. In the operation of saidmachine in cutting up green bones I have found it exceedingly difficultto provide the cutter-head with knifeblades capable of withstanding thestrain of cutting up the bones as specified in said patent. To overcomesaid difficulty, I have devised an improved construction of a rotarycutter having the knives formed integral therewith and of superiorstability and durability to perform the aforesaid function.

In the annexed drawings, Figure 1 is a face view of one side of theblank from which the cutter is formed. Fig. 2 is an edge view of saidblank. Fig. 3 isa transverse section on line X X in Fig. 1. Fig. 4 is aface view of the opposite side of the cutter formed from said blank.Fig. 5 is an edge view of said cutter, and Fig. 6 is a transversesect-ion on line Y Y in Fig. 4.

Myimprovedcutteris constructed ofadropforged wheel a, ofhighly-carbonized or finegrade steel, and formed with a peripheral rim1), projecting from one side thereof and beveled to one side of thewheel, as shown in Figs. 1, 2, and 3 of the drawings. The outer face ofsaid rim is formed with corresponding diagonal smooth ribs 0 c,distributed around said face, and with sloping faces 61 d oncorresponding sides of the ribs for the purpose hereinafter explained.

In manufacturing the cutter the Wheel a is to be presented with thesloping faces at d in succession to a suitable milling-tool whileholding the blank in a position to cause said tool to cut at said facescorresponding diago- ,50 nal slots 25 through the rim 1) and through thegreater peripheral edge of the wheel and at acute angles to the portionsof the rim adjacent to one side of each rib c, and thus form along saidside of the rib a cutting edge e, integral with the rim. The aforesaidfaces d d are essential to allow the milling-tool to properly attack theblank at the beginning of the operation of cutting the slots 25.

To provide the cutter with suitable throats for the escape of thecuttings during the operation of said cutter, I apply the milling-tooltwice at different angles at each slot 25, so as to flare the slot fromthe outer to the inner peripheries'of the rim b.

After the cutter is formed in the manner hereinbefore described it is tobe tempered to impart to the cutting edges the requisite hardness andrigidity.

What I claim as my invention is-- 1. As an improved article ofmanufacture, an annular cutter consisting of a drop-forged wheel ofsteel formed with a peripheral rim beveled to one side of the wheel andhaving on the exterior of said rim correspondinglydisposed diagonal ribsand sloping faces on corresponding sides of said ribs, and slotsextending transversely through the rim at said sloping faces and throughthe greater peripheral edge thereof to form cutting edges di rectly onsaid sloping faces as set forth.

2. Theimprovedcutterconsistingofadropforged Wheel of steel formed with aperipheral rim beveled to one side of the wheel and hav ing on theexterior of said rim corresponding diagonal ribs and sloping faces oncorresponding sides of said ribs, and slots milled through the rim atsaid sloping faces and extending through the greater periphery of therim and at acute angles to the portions of the rim ad- 90 jacent tooneside of each rib to form integral cutting edges thereat as set forthand shown.

HENRY ANSEL HANNUM. [as] Witnesses:

J. J. LAASS, WM. HAWLE-Y.

